/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineSessionInterface.h
Adds a new named session to the list (from existing session data)
a pointer to the struct that was added
[FNamedOnlineSession](API\Plugins\OnlineSubsystem\FNamedOnlineSession) * AddNamedSession ( [FName](API\Runtime\Core\UObject\FName) SessionName, const [FOnlineSession](API\Plugins\OnlineSubsystem\FOnlineSession) & Session )